libpq: How to get the error code after a failed PGconn connection

<div dir="ltr"><div class="" itemprop="description">Given the following code.<br /><br />PGconn* const
conn=PQconnectdbParams(keywords,values, false);<br />if(! conn || PQstatus(conn)!=CONNECTION_OK){ /* error code? */
}<br/><br /> - In case of a failed connection is there a way to get the error code to be able to distinguish between a
(e.g.)bad password and the server being down.<br /><br />(I know I can get the error message, but I want to be able to
reactto the cause of the error according to its cause, plus the error message is localized so I can't even scan that
forkeywords such as "permission denied").<br /><br /></div><div class="" itemprop="description">ps. I've looked at how
psqldoes it, and it seems it just prints the error message and exists.<br /><br />ps. I've tried to take a look at the
sourcebut it seems it just sets the status to CONNECTION_BAD no matter the cause of error, then sets a specific error
message.<br/><br />Any help appreciated.<br /></div><div class="" itemprop="description"><br />Thanks.</div></div>